Salty Gasp Warning Hot 

Warning; a hot salty gasp is eminent. 

Literal: Lips with Saltshaker

Abstractly: Sense of impending sexiness.  

Narrative: A couple's lips grow closer.

http://i67.photobucket.com/albums/h309/righand/BitingLips.jpg

http://pro.corbis.com/images/42-17406038.jpg?size=572&uid=%7B16B426D6-BBC1-42F5-B75D-D96931C5A03F%7D